A dry absorption tower demisting device for high-purity sulfuric acid production

By using the external and internal demister groups of the dry adsorption tower demister device to adsorb acidic droplets during the high-purity sulfuric acid production process, the problem of acid foam generated when the gas and liquid phases come into contact is solved, the service life of the equipment is improved and the maintenance cost is reduced.

CN224331801UActive Publication Date: 2026-06-09GUANGDONG XIANGHE FINE CHEM CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
GUANGDONG XIANGHE FINE CHEM CO LTD
Filing Date
2025-03-20
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In the current high-purity sulfuric acid production process, a large amount of acid foam is generated when the gas and liquid phases come into countercurrent contact, which leads to corrosion of equipment in subsequent processes and increases equipment maintenance costs.

Method used

A dry adsorption tower demister for high-purity sulfuric acid production is adopted, comprising a tower body, a demister mechanism, and a connecting mechanism. The demister mechanism consists of an outer demister group and an inner demister group from the outside to the inside. It can be detachably installed in the tower body through the connecting mechanism. The outer demister group and the inner demister group adsorb acidic mist droplets in the gas phase, thereby reducing the acid mist content in the gas phase.

Benefits of technology

It significantly reduces the acid foam content in the gas phase, avoids corrosion of equipment in subsequent processes, extends equipment service life, and reduces equipment maintenance costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a dry absorption tower demisting device for high-purity sulfuric acid production, which comprises a tower body, a demisting mechanism arranged in the tower body, and a connecting mechanism arranged between the tower body and the demisting mechanism, wherein the demisting mechanism comprises an outer demisting group and an inner demisting group arranged on the connecting mechanism in sequence from outside to inside, the outer demisting group comprises a plurality of outer demisting pieces arranged at intervals around the central axis of the tower body, and the inner demisting group comprises a plurality of inner demisting pieces arranged at intervals around the central axis of the tower body. In the production process of high-purity sulfuric acid, the acid mist generated when the gas phase and the liquid phase are in reverse contact can be adsorbed by the outer demisting group and the inner demisting group, the acid foam entrained in the gas phase is significantly reduced, the production equipment in the subsequent section is prevented from being corroded by the acid foam in the gas phase, the service life of the production equipment in the subsequent section is significantly prolonged, the equipment maintenance cost in the production process of high-purity sulfuric acid is reduced, and the device has the advantages of simple structure, low implementation cost, simple operation, and easy popularization and implementation.
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Description

Technical Field

[0001] This application belongs to the technical field of acid production equipment, specifically relating to a dry absorption tower demisting device for high-purity sulfuric acid production. Background Technology

[0002] In existing technologies, the common production process for high-purity sulfuric acid involves mixing sulfur trioxide gas and raw acid liquid. After the gas and liquid phases come into countercurrent contact, the liquid phase absorbs the sulfur trioxide from the gas phase to obtain high-purity sulfuric acid. However, in actual production, a large amount of acid foam is generated during the contact between the gas and liquid phases. The gas phase will entrain a large amount of acid foam during this process. This gas phase carrying a large amount of acid foam will be transported to subsequent stages, causing corrosion and damage to the impeller of the conveying fan and the expansion and contraction tubes of the heat exchanger, leading to system shutdown for maintenance and increased equipment costs.

[0003] In existing technologies, centrifugal demisters are often used to reduce acid foam in the absorption tower. However, in actual production, with the progress of mass production and the increase in production capacity, the existing centrifugal demisters have low demister efficiency. A large amount of acid foam is still entrained in the gas phase transported to subsequent processes, which has a great negative impact on the production equipment in subsequent processes, significantly reduces the service life of the production equipment in subsequent processes, and increases the equipment maintenance cost of the high-purity sulfuric acid production process. Therefore, it is urgent to make improvements to reduce acid foam in the gas phase. Utility Model Content

[0004] This application addresses the technical problem in the prior art where, during the production of high-purity sulfuric acid, the gas and liquid phases in the absorption tower come into countercurrent contact, generating a large amount of acid foam. This foam is then carried by the gas phase and transported to subsequent processes, corroding the equipment in those processes, significantly reducing the service life of the equipment, and increasing the equipment maintenance costs in the high-purity sulfuric acid production process. The application proposes a dry absorption tower demisting device for high-purity sulfuric acid production.

[0005] This application adopts the following solution: a demisting device for a dry absorption tower used in high-purity sulfuric acid production, comprising a tower body, a demisting mechanism disposed within the tower body, and a connecting mechanism disposed between the tower body and the demisting mechanism. The demisting mechanism is detachably disposed within the tower body via the connecting mechanism. The demisting mechanism includes an outer demisting group and an inner demisting group arranged sequentially from the outside to the inside on the connecting mechanism. The outer demisting group includes a plurality of outer demisting elements spaced apart around the central axis of the tower body, and the inner demisting group includes a plurality of inner demisting elements spaced apart around the central axis of the tower body.

[0006] In some feasible embodiments, the connecting mechanism includes a connecting plate disposed in the tower body, a connecting hole disposed on the connecting plate, and a connecting post disposed on the end of the external demister and / or the internal demister, the connecting post being able to extend into the connecting hole so that the external demister and / or the internal demister can be detachably disposed on the connecting plate.

[0007] In some feasible embodiments, the connecting mechanism further includes a fastening hole provided on the connecting post, and a fastener provided on the fastening hole. When the connecting post extends into the connecting hole, the fastener can extend into the fastening hole to detachably attach the external demister and / or the internal demister to the connecting plate.

[0008] In some feasible embodiments, the fastener has a handle at the end away from the fastening hole for the user to hold.

[0009] In some feasible embodiments, the external demisting component includes a first fixing mesh, a demisting fiber layer, and a second fixing mesh arranged sequentially from the outside to the inside. The material of the demisting fiber layer is selected from any one of polytetrafluoroethylene fiber, polypropylene fiber, glass fiber, carbon fiber, and stainless steel fiber.

[0010] In some feasible embodiments, the material of the defogging fiber layer is polytetrafluoroethylene fiber.

[0011] In some feasible embodiments, the first fixing net and the second fixing net are made of the same material, and the material of the first fixing net or the second fixing net is titanium alloy.

[0012] In some feasible embodiments, in this dry suction tower demister for high-purity sulfuric acid production,

[0013] Define the mesh size of the first fixed mesh as A;

[0014] Define the mesh size of the second fixed mesh as B;

[0015] The relationship between A and B is as follows: 1.25 ≤ A / B ≤ 1.75.

[0016] In some feasible embodiments, a sealing mechanism disposed on the tower body is also included, the sealing mechanism being used to seal the tower body.

[0017] In some feasible embodiments, the sealing mechanism includes a connecting lug on the tower body, a sealing cap covering the connecting lug, and a sealing gasket between the connecting lug and the sealing cap.

[0018] Compared with the prior art, this application has the following beneficial effects:

[0019] This application provides a demisting device for a dry absorption tower used in high-purity sulfuric acid production. The device includes a tower body, a demisting mechanism disposed within the tower body, and a connecting mechanism between the tower body and the demisting mechanism. The demisting mechanism comprises an outer demisting group and an inner demisting group arranged sequentially from the outside to the inside on the connecting mechanism. The outer demisting group includes multiple outer demisting elements spaced apart around the central axis of the tower body, and the inner demisting group includes multiple inner demisting elements spaced apart around the central axis of the tower body. By detachably assembling the outer and inner demisting groups within the tower body, acidic droplets generated during the high-purity sulfuric acid production process when the gas and liquid phases come into counter-current contact are adsorbed by the outer and inner demisting groups. This significantly reduces acid mist entrained in the gas phase, preventing corrosion of subsequent production equipment by acid mist in the gas phase, significantly extending the service life of subsequent production equipment, and reducing equipment maintenance costs in the high-purity sulfuric acid production process. The device has the advantages of simple structure, low implementation cost, easy operation, and ease of promotion and implementation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a dry suction tower demister for high-purity sulfuric acid production according to this application;

[0021] Figure 2 This is a top view of a dry suction tower demister for high-purity sulfuric acid production according to this application;

[0022] Figure 3 This application Figure 2 Sectional view at point AA;

[0023] Figure 4 This application Figure 3 A magnified view of a section at point A in the middle;

[0024] Figure 5 This is the original statement Figure 2 Cross-sectional view of section AA after the defogging mechanism has been removed;

[0025] Figure 6 This is a top view of a dry suction tower demister for high-purity sulfuric acid production after the sealing cover has been removed;

[0026] Figure 7 This is an exploded structural diagram of a dry suction tower demister for high-purity sulfuric acid production according to this application;

[0027] Figure 8 This is a schematic diagram of the cross-sectional structure of the external demisting component of this application. Detailed Implementation

[0028] Combination Figure 1-8The content shown further illustrates the technical solution provided in this application: a demisting device for a dry absorption tower in high-purity sulfuric acid production, comprising a tower body 1, a demisting mechanism 2 disposed within the tower body 1, and a connecting mechanism 3 disposed between the tower body 1 and the demisting mechanism 2. The demisting mechanism 2 is detachably disposed within the tower body 1 via the connecting mechanism 3. The demisting mechanism 2 includes an outer demisting group 4 and an inner demisting group 5 disposed sequentially from the outside to the inside on the connecting mechanism 3. The outer demisting group 4 includes a plurality of outer demisting elements 40 spaced apart around the central axis of the tower body 1, and the inner demisting group 5 includes a plurality of inner demisting elements 50 spaced apart around the central axis of the tower body 1.

[0029] This application provides a demisting device for a dry absorption tower used in high-purity sulfuric acid production. The device includes a tower body, a demisting mechanism disposed within the tower body, and a connecting mechanism between the tower body and the demisting mechanism. The demisting mechanism comprises an outer demisting group and an inner demisting group arranged sequentially from the outside to the inside on the connecting mechanism. The outer demisting group includes multiple outer demisting elements spaced apart around the central axis of the tower body, and the inner demisting group includes multiple inner demisting elements spaced apart around the central axis of the tower body. By detachably assembling the outer and inner demisting groups within the tower body, acidic droplets generated during the high-purity sulfuric acid production process when the gas and liquid phases come into counter-current contact are adsorbed by the outer and inner demisting groups. This significantly reduces acid mist entrained in the gas phase, preventing corrosion of subsequent production equipment by acid mist in the gas phase, significantly extending the service life of subsequent production equipment, and reducing equipment maintenance costs in the high-purity sulfuric acid production process. The device has the advantages of simple structure, low implementation cost, easy operation, and ease of promotion and implementation.

[0030] In this embodiment, the connecting mechanism 3 includes a connecting plate 30 disposed inside the tower body 1, a connecting hole 31 disposed on the connecting plate 30, and a connecting post 32 disposed on the end of the external demister 40 and / or the internal demister 50. The connecting post 32 can be matched and extended into the connecting hole 31 so that the external demister 40 and / or the internal demister 50 can be detachably disposed on the connecting plate 30.

[0031] In actual implementation, the external and internal demisters have the same structure, which improves the adaptability of this technical solution in practical applications.

[0032] In this embodiment, the connecting mechanism 3 further includes a fastening hole 33 on the connecting post 32 and a fastener 34 that is matched on the fastening hole 33. When the connecting post 32 is matched and extended into the connecting hole 31, the fastener 34 can be matched and extended into the fastening hole 33 to detachably install the external demisting component 40 and / or the internal demisting component 50 onto the connecting plate 30.

[0033] In actual implementation, the fastening hole is a threaded hole and the fastener is a fastening bolt. When the fastener is inserted into the fastening hole, the nut part of the fastener (i.e., the fastening bolt) can abut against the connecting plate, so that the external demisting component can be detachably mounted on the connecting plate.

[0034] In this embodiment, the fastener 34 is provided with a handheld part 35 at the end away from the fastening hole 33, and the handheld part 35 is used for the user to hold.

[0035] In actual implementation, the handheld part makes it easy for users to rotate the fastener, reducing the difficulty of assembly.

[0036] In this embodiment, the external demisting component 40 includes a first fixing mesh 41, a demisting fiber layer 42, and a second fixing mesh 43 arranged sequentially from the outside to the inside. The material of the demisting fiber layer 42 is selected from any one of polytetrafluoroethylene fiber, polypropylene fiber, glass fiber, carbon fiber, and stainless steel fiber.

[0037] In this embodiment, the material of the defogging fiber layer 42 is polytetrafluoroethylene fiber.

[0038] In this embodiment, the first fixing net 41 and the second fixing net 43 are made of the same material, and the material of the first fixing net 41 or the second fixing net 43 is titanium alloy.

[0039] In practice, by selecting titanium alloys, the corrosion resistance of external demisters can be effectively improved and their weight reduced.

[0040] In the implementation of this embodiment, in the dry absorption tower demister device for high-purity sulfuric acid production,

[0041] Define the mesh size of the first fixed mesh 41 as A;

[0042] Define the mesh size of the second fixed mesh 43 as B;

[0043] The relationship between A and B is as follows: 1.25 ≤ A / B ≤ 1.75.

[0044] In actual implementation, A / B = 1.5.

[0045] In this embodiment, a sealing mechanism 6 is also provided on the tower body 1, which is used to seal the tower body 1.

[0046] In this embodiment, the sealing mechanism 6 includes a connecting lug 60 on the tower body 1, a sealing cover 61 covering the connecting lug 60, and a sealing gasket between the connecting lug 60 and the sealing cover 61.

[0047] In actual implementation, the sealing gasket is made of silicone.

[0048] This application provides a demisting device for a dry absorption tower used in high-purity sulfuric acid production. The device includes a tower body, a demisting mechanism disposed within the tower body, and a connecting mechanism between the tower body and the demisting mechanism. The demisting mechanism comprises an outer demisting group and an inner demisting group arranged sequentially from the outside to the inside on the connecting mechanism. The outer demisting group includes multiple outer demisting elements spaced apart around the central axis of the tower body, and the inner demisting group includes multiple inner demisting elements spaced apart around the central axis of the tower body. By detachably assembling the outer and inner demisting groups within the tower body, acidic droplets generated during the high-purity sulfuric acid production process when the gas and liquid phases come into counter-current contact are adsorbed by the outer and inner demisting groups. This significantly reduces acid mist entrained in the gas phase, preventing corrosion of subsequent production equipment by acid mist in the gas phase, significantly extending the service life of subsequent production equipment, and reducing equipment maintenance costs in the high-purity sulfuric acid production process. The device has the advantages of simple structure, low implementation cost, easy operation, and ease of promotion and implementation.

[0049] The above are merely embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dry adsorption tower demister for high-purity sulfuric acid production, characterized in that, The system includes a tower body (1), a demisting mechanism (2) disposed within the tower body (1), and a connecting mechanism (3) disposed between the tower body (1) and the demisting mechanism (2). The demisting mechanism (2) is detachably disposed within the tower body (1) via the connecting mechanism (3). The demisting mechanism (2) includes an outer demisting group (4) and an inner demisting group (5) disposed sequentially from the outside to the inside on the connecting mechanism (3). The outer demisting group (4) includes a plurality of outer demisting elements (40) spaced apart around the central axis of the tower body (1), and the inner demisting group (5) includes a plurality of inner demisting elements (50) spaced apart around the central axis of the tower body (1). The external demisting component (40) includes a first fixing mesh (41), a demisting fiber layer (42), and a second fixing mesh (43) arranged sequentially from the outside to the inside. The material of the defogging fiber layer (42) is polytetrafluoroethylene fiber.

2. The dry suction tower demister for high-purity sulfuric acid production according to claim 1, characterized in that, The connecting mechanism (3) includes a connecting plate (30) disposed in the tower body (1), a connecting hole (31) disposed on the connecting plate (30), and a connecting post (32) disposed on the end of the external demister (40) and / or the internal demister (50). The connecting post (32) can be matched and extended into the connecting hole (31) so that the external demister (40) and / or the internal demister (50) can be detachably disposed on the connecting plate (30).

3. The dry suction tower demisting device for high-purity sulfuric acid production according to claim 2, characterized in that, The connecting mechanism (3) further includes a fastening hole (33) provided on the connecting post (32) and a fastener (34) provided on the fastening hole (33). When the connecting post (32) is inserted into the connecting hole (31), the fastener (34) can be inserted into the fastening hole (33) to detachably attach the external demister (40) and / or the internal demister (50) to the connecting plate (30).

4. The dry suction tower demisting device for high-purity sulfuric acid production according to claim 3, characterized in that, The fastener (34) has a handle (35) at one end away from the fastening hole (33), and the handle (35) is for the user to hold.

5. The dry adsorption tower demisting device for high-purity sulfuric acid production according to claim 1, characterized in that, The first fixing net (41) and the second fixing net (43) are made of the same material, and the material of the first fixing net (41) or the second fixing net (43) is titanium alloy.

6. The dry suction tower demister for high-purity sulfuric acid production according to claim 1, characterized in that, Define the mesh size of the first fixed mesh (41) as A; Define the mesh size of the second fixed mesh (43) as B; A and B satisfy the following relationship: 1.25≤A / B≤1.

75.

7. The dry suction tower demister for high-purity sulfuric acid production according to claim 1, characterized in that, It also includes a sealing mechanism (6) provided on the tower body (1), the sealing mechanism (6) being used to seal the tower body (1).

8. The dry suction tower demister for high-purity sulfuric acid production according to claim 7, characterized in that, The sealing mechanism (6) includes a connecting lug (60) on the tower body (1), a sealing cap (61) covering the connecting lug (60), and a sealing gasket between the connecting lug (60) and the sealing cap (61).